Multiple choice general knowledge

After age __, the brain shrinks a quarter of a percent (.25%) in mass each year.

  1. 55

  2. 45

  3. 30

  4. 25
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Brain atrophy is measurable from early adulthood, with approximately 0.25% annual loss in mass starting around age 30. This is a normal part of aging, not a pathological condition. The brain's volume loss accelerates in later decades but begins gradually in the third decade of life.

Keep practicing — related questions